plugins/org.eclipse.jst.servlet.ui/servlet_ui/org/eclipse/jst/servlet/ui/internal/wizard/AddEditFilterMappingDialog.java - gerrit/jeetools/webtools.javaee - Git at Google

 /*******************************************************************************
  * Copyright (c) 2007, 2008 SAP AG and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * Kaloyan Raev, kaloyan.raev@sap.com - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jst.servlet.ui.internal.wizard;

 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.ERROR;
 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.FORWARD;
 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.INCLUDE;
 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.REQUEST;
 import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.URL_PATTERN_LABEL;

 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;

 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.operation.IRunnableContext;
 import org.eclipse.jface.resource.ImageDescriptor;
 import org.eclipse.jface.viewers.ILabelProvider;
 import org.eclipse.jface.viewers.LabelProvider;
 import org.eclipse.jst.j2ee.internal.dialogs.TwoArrayQuickSorter;
 import org.eclipse.jst.j2ee.internal.web.operations.FilterMappingItem;
 import org.eclipse.jst.j2ee.internal.web.operations.IFilterMappingItem;
 import org.eclipse.jst.j2ee.internal.web.plugin.WebPlugin;
 import org.eclipse.jst.j2ee.internal.web.providers.WebAppEditResourceHandler;
 import org.eclipse.jst.j2ee.model.IModelProvider;
 import org.eclipse.jst.j2ee.model.ModelProviderManager;
 import org.eclipse.jst.j2ee.webapplication.Servlet;
 import org.eclipse.jst.servlet.ui.internal.plugin.ServletUIPlugin;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.events.DisposeEvent;
 import org.eclipse.swt.events.DisposeListener;
 import org.eclipse.swt.events.SelectionEvent;
 import org.eclipse.swt.events.SelectionListener;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Button;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Event;
 import org.eclipse.swt.widgets.Group;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Listener;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.swt.widgets.Text;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.dialogs.SelectionStatusDialog;
 import org.eclipse.ui.internal.layout.CellLayout;
 import org.eclipse.ui.part.PageBook;

 /**
  * Insert the type's description here.
  * Creation date: (7/30/2001 11:16:36 AM)
  */
 public class AddEditFilterMappingDialog extends SelectionStatusDialog implements SelectionListener {

 	private static class TypeRenderer extends LabelProvider {
         private final Image SERVLET_ICON =
             ImageDescriptor.createFromURL((URL) WebPlugin.getDefault().getImage("servlet")).createImage(); //$NON-NLS-1$

         @Override
 		public String getText(Object element) {
             return ((String) element);
         }

         @Override
 		public Image getImage(Object element) {
             return SERVLET_ICON;
         }

 	}

     public final static int SERVLET = 0;
 	public final static int URL_PATTERN = 1;
 	protected Button fServletButton;
 	protected Button fURLPatternButton;
 	protected int fSelection = -1;
 	protected PageBook fPageBook = null;
 	protected Control fURLPatternControl = null;
 	protected Control fServletControl = null;
 	protected Composite fChild = null;
 	// construction parameters
 	protected IRunnableContext fRunnableContext;
 	protected ILabelProvider fElementRenderer;
 	private Object[] fElements;
 	private boolean fIgnoreCase = true;
 	private String fUpperListLabel;

 	// SWT widgets
 	private Table fUpperList;
 	protected Text fURLText;
 	private String[] fServletNames;
 	private String[] fRenderedStrings;
 	private int dispatchers;
 	private Button fRequest;
 	private Button fForward;
 	private Button fInclude;
 	private Button fErorr;
 	private IFilterMappingItem selectedItem;

 	/**
 	 * MultiSelectFilteredFileSelectionDialog constructor comment.
 	 * @param parent Shell
 	 * @param title String
 	 * @param message String
 	 * @parent extensions String[]
 	 * @param allowMultiple boolean
 	 */
 	public AddEditFilterMappingDialog(Shell parent, String title, IProject project,
 	        List<IFilterMappingItem> elements, IFilterMappingItem item) {
 		super(parent);
 		selectedItem = item;
 		setShellStyle(SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL | SWT.RESIZE);

 		if (title == null)
 			setTitle(WebAppEditResourceHandler.getString("File_Selection_UI_")); //$NON-NLS-1$
 		else setTitle(title);

 		Status currStatus = new Status(Status.OK, ServletUIPlugin.PLUGIN_ID, Status.OK, "", null); //$NON-NLS-1$

 		updateStatus(currStatus);
 		fElementRenderer = new TypeRenderer();
 		fRunnableContext = ServletUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
 		try {
             IModelProvider provider = ModelProviderManager.getModelProvider(project);
             Object mObj = provider.getModelObject();
             ArrayList<String> servletsList = new ArrayList<String>();
             if (mObj instanceof org.eclipse.jst.j2ee.webapplication.WebApp) {
                 org.eclipse.jst.j2ee.webapplication.WebApp webApp = (org.eclipse.jst.j2ee.webapplication.WebApp) mObj;
                 List<Servlet> servlets = webApp.getServlets();
                 for (Servlet servlet : servlets) {
                     String servletName = servlet.getServletName();
                     if (!servletName.equals(item != null ? item.getName() : null) &&
                             isAlreadyAdded(servletName, elements)) continue;
                     servletsList.add(servletName);
                 }
             } else if (mObj instanceof org.eclipse.jst.javaee.web.WebApp) {
                 org.eclipse.jst.javaee.web.WebApp webApp= (org.eclipse.jst.javaee.web.WebApp) mObj;
                 List<org.eclipse.jst.javaee.web.Servlet> servlets = webApp.getServlets();
                 for (org.eclipse.jst.javaee.web.Servlet servlet : servlets) {
                     String servletName = servlet.getServletName();
                     if (!servletName.equals(item != null ? item.getName() : null) &&
                             isAlreadyAdded(servletName, elements)) continue;
                     servletsList.add(servletName);
                 }
             }

             fServletNames = servletsList.toArray(new String[servletsList.size()]);
             servletsList = null;
         } catch (Exception e) {
             ServletUIPlugin.log(e);
         }
 	}

     private boolean isAlreadyAdded(String servlet, List<IFilterMappingItem> elements) {
         for (Iterator iterator = elements.iterator(); iterator.hasNext();) {
             IFilterMappingItem item = (IFilterMappingItem) iterator.next();
             if (item.isServletNameType() && item.getName().equals(servlet))
                 return true;
         }
         return false;
     }

     /**
 	 * @private
 	 */
     @Override
 	protected void computeResult() {
         if (fSelection == URL_PATTERN) {
             java.util.List result = new ArrayList(1);
             dispatchers = getDispatchers();
             FilterMappingItem mappingItem =
                 new FilterMappingItem(FilterMappingItem.URL_PATTERN, fURLText.getText().trim(),
                         dispatchers);
             result.add(mappingItem);
             setResult(result);
         } else {
             String servletName = (String) getWidgetSelection();
             if (servletName == null) {
 //              String title = WebAppEditResourceHandler.getString("Select_Class_UI_"); //$NON-NLS-1$ = "Select Class"
 //              String message = WebAppEditResourceHandler.getString("Could_not_uniquely_map_the_ERROR_"); //$NON-NLS-1$ = "Could not uniquely map the class name to a class."
 //              MessageDialog.openError(getShell(), title, message);
                 setResult(null);
             } else {
                 dispatchers = getDispatchers();
                 java.util.List result = new ArrayList(1);
                 FilterMappingItem mappingItem =
                     new FilterMappingItem(FilterMappingItem.SERVLET_NAME, servletName, dispatchers);
                 result.add(mappingItem);
                 setResult(result);
             }
         }
     }

     private int getDispatchers() {
         int dispatchers = 0;
         if (fRequest.getSelection()) {
             dispatchers |= IFilterMappingItem.REQUEST;
         }
         if (fForward.getSelection()) {
             dispatchers |= IFilterMappingItem.FORWARD;
         }
         if (fInclude.getSelection()) {
             dispatchers |= IFilterMappingItem.INCLUDE;
         }
         if (fErorr.getSelection()) {
             dispatchers |= IFilterMappingItem.ERROR;
         }
         return dispatchers;
     }

 	@Override
 	public void create() {
 		super.create();
         if (selectedItem == null && (fServletNames != null && fServletNames.length > 0)) fSelection = SERVLET;
 		updateOkState();
 	}

 	/**
 	 * Creates and returns the contents of this dialog's
 	 * button bar.
 	 * <p>
 	 * The <code>Dialog</code> implementation of this framework method
 	 * lays out a button bar and calls the <code>createButtonsForButtonBar</code>
 	 * framework method to populate it. Subclasses may override.
 	 * </p>
 	 *
 	 * @param parent the parent composite to contain the button bar
 	 * @return the button bar control
 	 */
 	@Override
 	protected Control createButtonBar(Composite parent) {
 		Composite composite = new Composite(parent, SWT.NULL);
 		GridLayout layout = new GridLayout();

 		layout.numColumns = 2;

 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		composite.setLayout(layout);
 		composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

 		Composite composite2 = new Composite(composite, SWT.NONE);

 		// create a layout with spacing and margins appropriate for the font size.
 		layout = new GridLayout();
 		layout.numColumns = 0; // this is incremented by createButton
 		layout.makeColumnsEqualWidth = true;
 		layout.marginWidth = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_MARGIN);
 		layout.marginHeight = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_MARGIN);
 		layout.horizontalSpacing = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_SPACING);
 		layout.verticalSpacing = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_SPACING);

 		composite2.setLayout(layout);

 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END | GridData.VERTICAL_ALIGN_CENTER);
 		composite2.setLayoutData(data);

 		composite2.setFont(parent.getFont());

 		// Add the buttons to the button bar.
 		super.createButtonsForButtonBar(composite2);

 		return composite;
 	}

 	/*
 	 * @private
 	 */
 	@Override
 	protected Control createDialogArea(Composite parent) {
 		GridData gd = new GridData();

 		fChild = new Composite(parent, SWT.NONE);
 		PlatformUI.getWorkbench().getHelpSystem().setHelp(fChild, "com.ibm.etools.webapplicationedit.webx2010"); //$NON-NLS-1$
 		GridLayout gl = new GridLayout();
 		gl.numColumns = 2;
 		gl.marginHeight = 0;
 		fChild.setLayout(gl);

 		gd.verticalAlignment = GridData.FILL;
 		gd.grabExcessVerticalSpace = true;
 		fChild.setLayoutData(gd);

 		// Create the Web Type radio buttons and text fields.
 		fServletButton = new Button(fChild, SWT.RADIO);
 		fServletButton.setText(WebAppEditResourceHandler.getString("Servlet_UI_")); //$NON-NLS-1$ = Servlet
 		gd = new GridData();
 		fServletButton.setLayoutData(gd);
 		fServletButton.addSelectionListener(this);

 		fURLPatternButton = new Button(fChild, SWT.RADIO);
 		fURLPatternButton.setText(WebAppEditResourceHandler.getString("URL_pattern_UI_")); //$NON-NLS-1$
 		gd = new GridData();
 		fURLPatternButton.setLayoutData(gd);
 		fURLPatternButton.addSelectionListener(this);

 		//Create URL Pattern page
 		fPageBook = new PageBook(fChild, SWT.NONE);
 		gd = new GridData();
 		gd.horizontalAlignment = GridData.FILL;
 		gd.verticalAlignment = GridData.FILL;
 		gd.grabExcessHorizontalSpace = true;
 		gd.grabExcessVerticalSpace = true;
 		gd.horizontalSpan = 2;
 		fPageBook.setLayoutData(gd);

         Composite composite = new Composite(fPageBook, SWT.NONE);
         GridLayout layout = new GridLayout();
         layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
         layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
         layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
         layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
         composite.setLayout(layout);
         composite.setLayoutData(new GridData(GridData.FILL_BOTH));
         composite.setFont(parent.getFont());

         Label messageLabel = new Label(composite, SWT.NONE);
         gd = new GridData();
         messageLabel.setLayoutData(gd);
         messageLabel.setText(URL_PATTERN_LABEL);

         fURLText = new Text(composite, SWT.BORDER);
         GridData spec = new GridData();
         spec.grabExcessVerticalSpace = false;
         spec.grabExcessHorizontalSpace = true;
         spec.horizontalAlignment = GridData.FILL;
         spec.verticalAlignment = GridData.BEGINNING;
         fURLText.setLayoutData(spec);
         Listener l = new Listener() {
             public void handleEvent(Event evt) {
                 updateOkState();
             }
         };
         fURLText.addListener(SWT.Modify, l);
         fURLPatternControl = composite;

         //Create Servlet page
         composite = new Composite(fPageBook, SWT.NONE);
         layout = new GridLayout();
         layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
         layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
         layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
         layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
         composite.setLayout(layout);
         composite.setLayoutData(new GridData(GridData.FILL_BOTH));
         composite.setFont(parent.getFont());

         messageLabel = new Label(composite, SWT.NONE);
         gd = new GridData();
         messageLabel.setLayoutData(gd);
         messageLabel.setText(WebAppEditResourceHandler.getString("Choose_a_servlet__1")); //$NON-NLS-1$

         fUpperList = createUpperList(composite);

         fServletControl = composite;

         //Create Dispatchers control
         Group dispatchers = new Group(fChild, SWT.SHADOW_IN);
         dispatchers.setText(WebAppEditResourceHandler.getString("Select_Dispatchers_UI_")); //$NON-NLS-1$
         dispatchers.setLayout(new CellLayout(2).setMargins(10,10).setSpacing(5,5));
         GridData gridData = new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL);
         gridData.horizontalSpan = 2;
         dispatchers.setLayoutData(gridData);
         fRequest = new Button(dispatchers, SWT.CHECK);
         fRequest.setText(REQUEST);
         fForward = new Button(dispatchers, SWT.CHECK);
         fForward.setText(FORWARD);
         fInclude = new Button(dispatchers, SWT.CHECK);
         fInclude.setText(INCLUDE);
         fErorr = new Button(dispatchers, SWT.CHECK);
         fErorr.setText(ERROR);

         if (selectedItem != null) {
             if (selectedItem.isUrlPatternType()) {
                 fSelection = URL_PATTERN;
             } else {
                 fSelection = SERVLET;
             }
         } else {
             if (fServletNames == null || fServletNames.length == 0) {
                 fSelection = URL_PATTERN;
             }
         }
         updateUpperListWidget();

         fServletButton.setEnabled(true);
         if (fSelection == URL_PATTERN) {
             fURLPatternButton.setSelection(true);
             fPageBook.showPage(fURLPatternControl);
             fServletButton.setSelection(false);
             if (fServletNames == null || fServletNames.length == 0) {
                 fServletButton.setEnabled(false);
             }
             if (selectedItem != null) {
                 fURLText.setText(selectedItem.getName());
                 setDispatchers(selectedItem.getDispatchers());
             }
         } else {
             fServletButton.setSelection(true);
             fPageBook.showPage(fServletControl);
             if (selectedItem != null) {
                 fUpperList.setSelection(getServletIndex(fUpperList, selectedItem.getName()));
                 setDispatchers(selectedItem.getDispatchers());
             }
         }
 		updateOkState();
 		return parent;
 	}

     private int getServletIndex(Table list, String name) {
         TableItem[] items = list.getItems();
         for (int i = 0; i < items.length; i++) {
             TableItem tableItem = items[i];
             if (tableItem.getText().equals(name)) return i;
         }
         return -1;
     }

 	private void setDispatchers(int dispatchers) {
         if ((dispatchers & IFilterMappingItem.REQUEST) > 0) {
             fRequest.setSelection(true);
         }
         if ((dispatchers & IFilterMappingItem.FORWARD) > 0) {
             fForward.setSelection(true);
         }
         if ((dispatchers & IFilterMappingItem.INCLUDE) > 0) {
             fInclude.setSelection(true);
         }
         if ((dispatchers & IFilterMappingItem.ERROR) > 0) {
             fErorr.setSelection(true);
         }
     }

 	/**
 	 * Creates the list widget and sets layout data.
 	 * @return org.eclipse.swt.widgets.List
 	 */
 	private Table createUpperList(Composite parent) {
 		if (fUpperListLabel != null)
 			 (new Label(parent, SWT.NONE)).setText(fUpperListLabel);

 		Table list = new Table(parent, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
 //		list.addListener(SWT.Selection, new Listener() {
 //			public void handleEvent(Event evt) {
 //				handleUpperSelectionChanged();
 //			}
 //		});
 		list.addListener(SWT.MouseDoubleClick, new Listener() {
 			public void handleEvent(Event evt) {
 				handleUpperDoubleClick();
 			}
 		});
 		list.addDisposeListener(new DisposeListener() {
 			public void widgetDisposed(DisposeEvent e) {
 				fElementRenderer.dispose();
 			}
 		});
 		GridData spec = new GridData();
 		spec.widthHint = convertWidthInCharsToPixels(50);
 		spec.heightHint = convertHeightInCharsToPixels(4);
 		spec.grabExcessVerticalSpace = true;
 		spec.grabExcessHorizontalSpace = true;
 		spec.horizontalAlignment = GridData.FILL;
 		spec.verticalAlignment = GridData.FILL;
 		list.setLayoutData(spec);
 		return list;
 	}

 	/**
 	 * @return the ID of the button that is 'pressed' on doubleClick in the lists.
 	 * By default it is the OK button.
 	 * Override to change this setting.
 	 */
 	protected int getDefaultButtonID() {
 		return IDialogConstants.OK_ID;
 	}

 	public int getSelectedItem() {
 		return fSelection;
 	}

 	protected Object getWidgetSelection() {
         int index = fUpperList.getSelectionIndex();
         return index >= 0 ? fElements[index] : null;
 	}

 	protected final void handleLowerDoubleClick() {
 		if (getWidgetSelection() != null)
 			buttonPressed(getDefaultButtonID());
 	}

 	protected final void handleLowerSelectionChanged() {
 		updateOkState();
 	}

 	protected final void handleUpperDoubleClick() {
 		if (getWidgetSelection() != null)
 			buttonPressed(getDefaultButtonID());
 	}

 	@Override
 	public int open() {
         if (fServletNames == null || fServletNames.length == 0) {
             fSelection = URL_PATTERN;
         }

         setElements(fServletNames);
         setInitialSelections(new Object[] { "" }); //$NON-NLS-1$
         return super.open();
 	}

 	/**
 	 *
 	 * @return java.lang.String[]
 	 * @param p org.eclipse.jface.elements.IIndexedProperty
 	 */
 	private String[] renderStrings(Object[] p) {
 		String[] strings = new String[p.length];
 		int size = strings.length;
 		for (int i = 0; i < size; i++) {
 			strings[i] = fElementRenderer.getText(p[i]);
 		}
 		new TwoArrayQuickSorter(fIgnoreCase).sort(strings, p);
 		return strings;
 	}

 	public void setElements(Object[] elements) {
 	    Object [] innerElements = elements;
 		if (innerElements == null){
 			innerElements = new Object[0];
 	    }
 		fElements = innerElements;
 		fRenderedStrings = renderStrings(fElements);
 	}

 	public void setSelectedItem(int newSelection) {
 		fSelection = newSelection;
 	}

 	private void updateOkState() {
 		Button okButton = getOkButton();
 		if (okButton != null)
 		    if (fSelection == SERVLET) {
 		        okButton.setEnabled(getWidgetSelection() != null);
 		    } else {
 		        String result = fURLText.getText().trim();
 		        okButton.setEnabled(result.length() > 0);
 		    }
 	}

     private void updateUpperListWidget() {
         fUpperList.setRedraw(false);
         fUpperList.clearAll();
         for (int i = 0; i < fRenderedStrings.length; i++) {
             TableItem ti = new TableItem(fUpperList, SWT.NONE);
             ti.setText(fRenderedStrings[i]);
             // XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
             Image img = fElementRenderer.getImage(fRenderedStrings[i]);
             ti.setImage(img);
         }
         if (fUpperList.getItemCount() > 0) {
             fUpperList.setSelection(0);
         }
         fUpperList.setRedraw(true);
     }

 	/**
 	 * Sent when default selection occurs in the control.
 	 * <p>
 	 * For example, on some platforms default selection occurs
 	 * in a List when the user double-clicks an item or types
 	 * return in a Text.
 	 * </p>
 	 *
 	 * @param e an event containing information about the default selection
 	 */
 	public void widgetDefaultSelected(SelectionEvent e) {
 		// Do nothing
 	}

 	/**
 	 * Sent when selection occurs in the control.
 	 * <p>
 	 * For example, on some platforms selection occurs in
 	 * a List when the user selects an item or items.
 	 * </p>
 	 *
 	 * @param e an event containing information about the selection
 	 */
 	public void widgetSelected(SelectionEvent e) {
 		if (e.widget == fURLPatternButton) {
 			fSelection = URL_PATTERN;
 			fPageBook.showPage(fURLPatternControl);
 			updateOkState();
 		} else if (e.widget == fServletButton) {
 			fSelection = SERVLET;
 			fPageBook.showPage(fServletControl);
 			getShell().pack();
 		} else
 			fSelection = -1;
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2007, 2008 SAP AG and others.
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License v1.0
	* which accompanies this distribution, and is available at
	* http://www.eclipse.org/legal/epl-v10.html
	*
	* Contributors:
	* Kaloyan Raev, kaloyan.raev@sap.com - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jst.servlet.ui.internal.wizard;

	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.ERROR;
	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.FORWARD;
	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.INCLUDE;
	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.REQUEST;
	import static org.eclipse.jst.servlet.ui.internal.wizard.IWebWizardConstants.URL_PATTERN_LABEL;

	import java.net.URL;
	import java.util.ArrayList;
	import java.util.Iterator;
	import java.util.List;

	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.runtime.Status;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.operation.IRunnableContext;
	import org.eclipse.jface.resource.ImageDescriptor;
	import org.eclipse.jface.viewers.ILabelProvider;
	import org.eclipse.jface.viewers.LabelProvider;
	import org.eclipse.jst.j2ee.internal.dialogs.TwoArrayQuickSorter;
	import org.eclipse.jst.j2ee.internal.web.operations.FilterMappingItem;
	import org.eclipse.jst.j2ee.internal.web.operations.IFilterMappingItem;
	import org.eclipse.jst.j2ee.internal.web.plugin.WebPlugin;
	import org.eclipse.jst.j2ee.internal.web.providers.WebAppEditResourceHandler;
	import org.eclipse.jst.j2ee.model.IModelProvider;
	import org.eclipse.jst.j2ee.model.ModelProviderManager;
	import org.eclipse.jst.j2ee.webapplication.Servlet;
	import org.eclipse.jst.servlet.ui.internal.plugin.ServletUIPlugin;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.events.DisposeEvent;
	import org.eclipse.swt.events.DisposeListener;
	import org.eclipse.swt.events.SelectionEvent;
	import org.eclipse.swt.events.SelectionListener;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.layout.GridData;
	import org.eclipse.swt.layout.GridLayout;
	import org.eclipse.swt.widgets.Button;
	import org.eclipse.swt.widgets.Composite;
	import org.eclipse.swt.widgets.Control;
	import org.eclipse.swt.widgets.Event;
	import org.eclipse.swt.widgets.Group;
	import org.eclipse.swt.widgets.Label;
	import org.eclipse.swt.widgets.Listener;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Table;
	import org.eclipse.swt.widgets.TableItem;
	import org.eclipse.swt.widgets.Text;
	import org.eclipse.ui.PlatformUI;
	import org.eclipse.ui.dialogs.SelectionStatusDialog;
	import org.eclipse.ui.internal.layout.CellLayout;
	import org.eclipse.ui.part.PageBook;

	/**
	* Insert the type's description here.
	* Creation date: (7/30/2001 11:16:36 AM)
	*/
	public class AddEditFilterMappingDialog extends SelectionStatusDialog implements SelectionListener {

	private static class TypeRenderer extends LabelProvider {
	private final Image SERVLET_ICON =
	ImageDescriptor.createFromURL((URL) WebPlugin.getDefault().getImage("servlet")).createImage(); //$NON-NLS-1$

	@Override
	public String getText(Object element) {
	return ((String) element);
	}

	@Override
	public Image getImage(Object element) {
	return SERVLET_ICON;
	}

	}

	public final static int SERVLET = 0;
	public final static int URL_PATTERN = 1;
	protected Button fServletButton;
	protected Button fURLPatternButton;
	protected int fSelection = -1;
	protected PageBook fPageBook = null;
	protected Control fURLPatternControl = null;
	protected Control fServletControl = null;
	protected Composite fChild = null;
	// construction parameters
	protected IRunnableContext fRunnableContext;
	protected ILabelProvider fElementRenderer;
	private Object[] fElements;
	private boolean fIgnoreCase = true;
	private String fUpperListLabel;

	// SWT widgets
	private Table fUpperList;
	protected Text fURLText;
	private String[] fServletNames;
	private String[] fRenderedStrings;
	private int dispatchers;
	private Button fRequest;
	private Button fForward;
	private Button fInclude;
	private Button fErorr;
	private IFilterMappingItem selectedItem;

	/**
	* MultiSelectFilteredFileSelectionDialog constructor comment.
	* @param parent Shell
	* @param title String
	* @param message String
	* @parent extensions String[]
	* @param allowMultiple boolean
	*/
	public AddEditFilterMappingDialog(Shell parent, String title, IProject project,
	List<IFilterMappingItem> elements, IFilterMappingItem item) {
	super(parent);
	selectedItem = item;
	setShellStyle(SWT.DIALOG_TRIM \| SWT.APPLICATION_MODAL \| SWT.RESIZE);

	if (title == null)
	setTitle(WebAppEditResourceHandler.getString("File_Selection_UI_")); //$NON-NLS-1$
	else setTitle(title);

	Status currStatus = new Status(Status.OK, ServletUIPlugin.PLUGIN_ID, Status.OK, "", null); //$NON-NLS-1$

	updateStatus(currStatus);
	fElementRenderer = new TypeRenderer();
	fRunnableContext = ServletUIPlugin.getDefault().getWorkbench().getActiveWorkbenchWindow();
	try {
	IModelProvider provider = ModelProviderManager.getModelProvider(project);
	Object mObj = provider.getModelObject();
	ArrayList<String> servletsList = new ArrayList<String>();
	if (mObj instanceof org.eclipse.jst.j2ee.webapplication.WebApp) {
	org.eclipse.jst.j2ee.webapplication.WebApp webApp = (org.eclipse.jst.j2ee.webapplication.WebApp) mObj;
	List<Servlet> servlets = webApp.getServlets();
	for (Servlet servlet : servlets) {
	String servletName = servlet.getServletName();
	if (!servletName.equals(item != null ? item.getName() : null) &&
	isAlreadyAdded(servletName, elements)) continue;
	servletsList.add(servletName);
	}
	} else if (mObj instanceof org.eclipse.jst.javaee.web.WebApp) {
	org.eclipse.jst.javaee.web.WebApp webApp= (org.eclipse.jst.javaee.web.WebApp) mObj;
	List<org.eclipse.jst.javaee.web.Servlet> servlets = webApp.getServlets();
	for (org.eclipse.jst.javaee.web.Servlet servlet : servlets) {
	String servletName = servlet.getServletName();
	if (!servletName.equals(item != null ? item.getName() : null) &&
	isAlreadyAdded(servletName, elements)) continue;
	servletsList.add(servletName);
	}
	}

	fServletNames = servletsList.toArray(new String[servletsList.size()]);
	servletsList = null;
	} catch (Exception e) {
	ServletUIPlugin.log(e);
	}
	}

	private boolean isAlreadyAdded(String servlet, List<IFilterMappingItem> elements) {
	for (Iterator iterator = elements.iterator(); iterator.hasNext();) {
	IFilterMappingItem item = (IFilterMappingItem) iterator.next();
	if (item.isServletNameType() && item.getName().equals(servlet))
	return true;
	}
	return false;
	}

	/**
	* @private
	*/
	@Override
	protected void computeResult() {
	if (fSelection == URL_PATTERN) {
	java.util.List result = new ArrayList(1);
	dispatchers = getDispatchers();
	FilterMappingItem mappingItem =
	new FilterMappingItem(FilterMappingItem.URL_PATTERN, fURLText.getText().trim(),
	dispatchers);
	result.add(mappingItem);
	setResult(result);
	} else {
	String servletName = (String) getWidgetSelection();
	if (servletName == null) {
	// String title = WebAppEditResourceHandler.getString("Select_Class_UI_"); //$NON-NLS-1$ = "Select Class"
	// String message = WebAppEditResourceHandler.getString("Could_not_uniquely_map_the_ERROR_"); //$NON-NLS-1$ = "Could not uniquely map the class name to a class."
	// MessageDialog.openError(getShell(), title, message);
	setResult(null);
	} else {
	dispatchers = getDispatchers();
	java.util.List result = new ArrayList(1);
	FilterMappingItem mappingItem =
	new FilterMappingItem(FilterMappingItem.SERVLET_NAME, servletName, dispatchers);
	result.add(mappingItem);
	setResult(result);
	}
	}
	}

	private int getDispatchers() {
	int dispatchers = 0;
	if (fRequest.getSelection()) {
	dispatchers \|= IFilterMappingItem.REQUEST;
	}
	if (fForward.getSelection()) {
	dispatchers \|= IFilterMappingItem.FORWARD;
	}
	if (fInclude.getSelection()) {
	dispatchers \|= IFilterMappingItem.INCLUDE;
	}
	if (fErorr.getSelection()) {
	dispatchers \|= IFilterMappingItem.ERROR;
	}
	return dispatchers;
	}

	@Override
	public void create() {
	super.create();
	if (selectedItem == null && (fServletNames != null && fServletNames.length > 0)) fSelection = SERVLET;
	updateOkState();
	}

	/**
	* Creates and returns the contents of this dialog's
	* button bar.
	* <p>
	* The <code>Dialog</code> implementation of this framework method
	* lays out a button bar and calls the <code>createButtonsForButtonBar</code>
	* framework method to populate it. Subclasses may override.
	* </p>
	*
	* @param parent the parent composite to contain the button bar
	* @return the button bar control
	*/
	@Override
	protected Control createButtonBar(Composite parent) {
	Composite composite = new Composite(parent, SWT.NULL);
	GridLayout layout = new GridLayout();

	layout.numColumns = 2;

	layout.marginHeight = 0;
	layout.marginWidth = 0;
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	Composite composite2 = new Composite(composite, SWT.NONE);

	// create a layout with spacing and margins appropriate for the font size.
	layout = new GridLayout();
	layout.numColumns = 0; // this is incremented by createButton
	layout.makeColumnsEqualWidth = true;
	layout.marginWidth = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_MARGIN);
	layout.marginHeight = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_MARGIN);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.HORIZONTAL_SPACING);
	layout.verticalSpacing = convertVerticalDLUsToPixels(org.eclipse.jface.dialogs.IDialogConstants.VERTICAL_SPACING);

	composite2.setLayout(layout);

	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_END \| GridData.VERTICAL_ALIGN_CENTER);
	composite2.setLayoutData(data);

	composite2.setFont(parent.getFont());

	// Add the buttons to the button bar.
	super.createButtonsForButtonBar(composite2);

	return composite;
	}

	/*
	* @private
	*/
	@Override
	protected Control createDialogArea(Composite parent) {
	GridData gd = new GridData();

	fChild = new Composite(parent, SWT.NONE);
	PlatformUI.getWorkbench().getHelpSystem().setHelp(fChild, "com.ibm.etools.webapplicationedit.webx2010"); //$NON-NLS-1$
	GridLayout gl = new GridLayout();
	gl.numColumns = 2;
	gl.marginHeight = 0;
	fChild.setLayout(gl);

	gd.verticalAlignment = GridData.FILL;
	gd.grabExcessVerticalSpace = true;
	fChild.setLayoutData(gd);

	// Create the Web Type radio buttons and text fields.
	fServletButton = new Button(fChild, SWT.RADIO);
	fServletButton.setText(WebAppEditResourceHandler.getString("Servlet_UI_")); //$NON-NLS-1$ = Servlet
	gd = new GridData();
	fServletButton.setLayoutData(gd);
	fServletButton.addSelectionListener(this);

	fURLPatternButton = new Button(fChild, SWT.RADIO);
	fURLPatternButton.setText(WebAppEditResourceHandler.getString("URL_pattern_UI_")); //$NON-NLS-1$
	gd = new GridData();
	fURLPatternButton.setLayoutData(gd);
	fURLPatternButton.addSelectionListener(this);

	//Create URL Pattern page
	fPageBook = new PageBook(fChild, SWT.NONE);
	gd = new GridData();
	gd.horizontalAlignment = GridData.FILL;
	gd.verticalAlignment = GridData.FILL;
	gd.grabExcessHorizontalSpace = true;
	gd.grabExcessVerticalSpace = true;
	gd.horizontalSpan = 2;
	fPageBook.setLayoutData(gd);

	Composite composite = new Composite(fPageBook, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
	layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
	layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(GridData.FILL_BOTH));
	composite.setFont(parent.getFont());

	Label messageLabel = new Label(composite, SWT.NONE);
	gd = new GridData();
	messageLabel.setLayoutData(gd);
	messageLabel.setText(URL_PATTERN_LABEL);

	fURLText = new Text(composite, SWT.BORDER);
	GridData spec = new GridData();
	spec.grabExcessVerticalSpace = false;
	spec.grabExcessHorizontalSpace = true;
	spec.horizontalAlignment = GridData.FILL;
	spec.verticalAlignment = GridData.BEGINNING;
	fURLText.setLayoutData(spec);
	Listener l = new Listener() {
	public void handleEvent(Event evt) {
	updateOkState();
	}
	};
	fURLText.addListener(SWT.Modify, l);
	fURLPatternControl = composite;

	//Create Servlet page
	composite = new Composite(fPageBook, SWT.NONE);
	layout = new GridLayout();
	layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
	layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
	layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	composite.setLayout(layout);
	composite.setLayoutData(new GridData(GridData.FILL_BOTH));
	composite.setFont(parent.getFont());

	messageLabel = new Label(composite, SWT.NONE);
	gd = new GridData();
	messageLabel.setLayoutData(gd);
	messageLabel.setText(WebAppEditResourceHandler.getString("Choose_a_servlet__1")); //$NON-NLS-1$

	fUpperList = createUpperList(composite);

	fServletControl = composite;

	//Create Dispatchers control
	Group dispatchers = new Group(fChild, SWT.SHADOW_IN);
	dispatchers.setText(WebAppEditResourceHandler.getString("Select_Dispatchers_UI_")); //$NON-NLS-1$
	dispatchers.setLayout(new CellLayout(2).setMargins(10,10).setSpacing(5,5));
	GridData gridData = new GridData(GridData.FILL_HORIZONTAL \| GridData.GRAB_HORIZONTAL);
	gridData.horizontalSpan = 2;
	dispatchers.setLayoutData(gridData);
	fRequest = new Button(dispatchers, SWT.CHECK);
	fRequest.setText(REQUEST);
	fForward = new Button(dispatchers, SWT.CHECK);
	fForward.setText(FORWARD);
	fInclude = new Button(dispatchers, SWT.CHECK);
	fInclude.setText(INCLUDE);
	fErorr = new Button(dispatchers, SWT.CHECK);
	fErorr.setText(ERROR);

	if (selectedItem != null) {
	if (selectedItem.isUrlPatternType()) {
	fSelection = URL_PATTERN;
	} else {
	fSelection = SERVLET;
	}
	} else {
	if (fServletNames == null \|\| fServletNames.length == 0) {
	fSelection = URL_PATTERN;
	}
	}
	updateUpperListWidget();

	fServletButton.setEnabled(true);
	if (fSelection == URL_PATTERN) {
	fURLPatternButton.setSelection(true);
	fPageBook.showPage(fURLPatternControl);
	fServletButton.setSelection(false);
	if (fServletNames == null \|\| fServletNames.length == 0) {
	fServletButton.setEnabled(false);
	}
	if (selectedItem != null) {
	fURLText.setText(selectedItem.getName());
	setDispatchers(selectedItem.getDispatchers());
	}
	} else {
	fServletButton.setSelection(true);
	fPageBook.showPage(fServletControl);
	if (selectedItem != null) {
	fUpperList.setSelection(getServletIndex(fUpperList, selectedItem.getName()));
	setDispatchers(selectedItem.getDispatchers());
	}
	}
	updateOkState();
	return parent;
	}

	private int getServletIndex(Table list, String name) {
	TableItem[] items = list.getItems();
	for (int i = 0; i < items.length; i++) {
	TableItem tableItem = items[i];
	if (tableItem.getText().equals(name)) return i;
	}
	return -1;
	}

	private void setDispatchers(int dispatchers) {
	if ((dispatchers & IFilterMappingItem.REQUEST) > 0) {
	fRequest.setSelection(true);
	}
	if ((dispatchers & IFilterMappingItem.FORWARD) > 0) {
	fForward.setSelection(true);
	}
	if ((dispatchers & IFilterMappingItem.INCLUDE) > 0) {
	fInclude.setSelection(true);
	}
	if ((dispatchers & IFilterMappingItem.ERROR) > 0) {
	fErorr.setSelection(true);
	}
	}

	/**
	* Creates the list widget and sets layout data.
	* @return org.eclipse.swt.widgets.List
	*/
	private Table createUpperList(Composite parent) {
	if (fUpperListLabel != null)
	(new Label(parent, SWT.NONE)).setText(fUpperListLabel);

	Table list = new Table(parent, SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL);
	// list.addListener(SWT.Selection, new Listener() {
	// public void handleEvent(Event evt) {
	// handleUpperSelectionChanged();
	// }
	// });
	list.addListener(SWT.MouseDoubleClick, new Listener() {
	public void handleEvent(Event evt) {
	handleUpperDoubleClick();
	}
	});
	list.addDisposeListener(new DisposeListener() {
	public void widgetDisposed(DisposeEvent e) {
	fElementRenderer.dispose();
	}
	});
	GridData spec = new GridData();
	spec.widthHint = convertWidthInCharsToPixels(50);
	spec.heightHint = convertHeightInCharsToPixels(4);
	spec.grabExcessVerticalSpace = true;
	spec.grabExcessHorizontalSpace = true;
	spec.horizontalAlignment = GridData.FILL;
	spec.verticalAlignment = GridData.FILL;
	list.setLayoutData(spec);
	return list;
	}

	/**
	* @return the ID of the button that is 'pressed' on doubleClick in the lists.
	* By default it is the OK button.
	* Override to change this setting.
	*/
	protected int getDefaultButtonID() {
	return IDialogConstants.OK_ID;
	}

	public int getSelectedItem() {
	return fSelection;
	}

	protected Object getWidgetSelection() {
	int index = fUpperList.getSelectionIndex();
	return index >= 0 ? fElements[index] : null;
	}

	protected final void handleLowerDoubleClick() {
	if (getWidgetSelection() != null)
	buttonPressed(getDefaultButtonID());
	}

	protected final void handleLowerSelectionChanged() {
	updateOkState();
	}

	protected final void handleUpperDoubleClick() {
	if (getWidgetSelection() != null)
	buttonPressed(getDefaultButtonID());
	}

	@Override
	public int open() {
	if (fServletNames == null \|\| fServletNames.length == 0) {
	fSelection = URL_PATTERN;
	}

	setElements(fServletNames);
	setInitialSelections(new Object[] { "" }); //$NON-NLS-1$
	return super.open();
	}

	/**
	*
	* @return java.lang.String[]
	* @param p org.eclipse.jface.elements.IIndexedProperty
	*/
	private String[] renderStrings(Object[] p) {
	String[] strings = new String[p.length];
	int size = strings.length;
	for (int i = 0; i < size; i++) {
	strings[i] = fElementRenderer.getText(p[i]);
	}
	new TwoArrayQuickSorter(fIgnoreCase).sort(strings, p);
	return strings;
	}

	public void setElements(Object[] elements) {
	Object [] innerElements = elements;
	if (innerElements == null){
	innerElements = new Object[0];
	}
	fElements = innerElements;
	fRenderedStrings = renderStrings(fElements);
	}

	public void setSelectedItem(int newSelection) {
	fSelection = newSelection;
	}

	private void updateOkState() {
	Button okButton = getOkButton();
	if (okButton != null)
	if (fSelection == SERVLET) {
	okButton.setEnabled(getWidgetSelection() != null);
	} else {
	String result = fURLText.getText().trim();
	okButton.setEnabled(result.length() > 0);
	}
	}

	private void updateUpperListWidget() {
	fUpperList.setRedraw(false);
	fUpperList.clearAll();
	for (int i = 0; i < fRenderedStrings.length; i++) {
	TableItem ti = new TableItem(fUpperList, SWT.NONE);
	ti.setText(fRenderedStrings[i]);
	// XXX: 1G65LDG: JFUIF:WIN2000 - ILabelProvider used outside a viewer
	Image img = fElementRenderer.getImage(fRenderedStrings[i]);
	ti.setImage(img);
	}
	if (fUpperList.getItemCount() > 0) {
	fUpperList.setSelection(0);
	}
	fUpperList.setRedraw(true);
	}

	/**
	* Sent when default selection occurs in the control.
	* <p>
	* For example, on some platforms default selection occurs
	* in a List when the user double-clicks an item or types
	* return in a Text.
	* </p>
	*
	* @param e an event containing information about the default selection
	*/
	public void widgetDefaultSelected(SelectionEvent e) {
	// Do nothing
	}

	/**
	* Sent when selection occurs in the control.
	* <p>
	* For example, on some platforms selection occurs in
	* a List when the user selects an item or items.
	* </p>
	*
	* @param e an event containing information about the selection
	*/
	public void widgetSelected(SelectionEvent e) {
	if (e.widget == fURLPatternButton) {
	fSelection = URL_PATTERN;
	fPageBook.showPage(fURLPatternControl);
	updateOkState();
	} else if (e.widget == fServletButton) {
	fSelection = SERVLET;
	fPageBook.showPage(fServletControl);
	getShell().pack();
	} else
	fSelection = -1;
	}
	}